Phase structure and electrochemical properties of La-Mg-Ni system La(2)Mg(0.9)Ni(7.5)Co(1.5)A(1.0) hydrogen storage alloys prepared by melt spun

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	Phase structure and electrochemical properties of La-Mg-Ni system La(2)Mg(0.9)Ni(7.5)Co(1.5)A(1.0) hydrogen storage alloys prepared by melt spun
	Wu Yanjun ; Wang Dahui ; Luo Yongchun ; Kang Long ; Yan Ruxu
刊名	RARE METAL MATERIALS AND ENGINEERING
	2007-10
卷号	36 期号:10 页码:1856-1860
关键词	melt spun La2Mg0.9Ni7.5CO1.5Al0.1 hydrogen storage alloy phase structure electrochemical property
ISSN号	1002-185X
英文摘要	The hydrogen storage alloys were prepared using induction melting followed by heating treatment and melt spun. The effect of melt spun on the phase structure, microstructure and electrochemical properties of La2Mg0.9Ni7.5CO1.5Al0.1 was investigated, systematically. XRD analysis shows that the obvious change of the phase composition of the La2Mg0.9Ni7.5CO1.5Al0.1 alloy took place with the increase of quenching rate. The annealed alloy consists of alpha La2Ni7 main phase with Ce2Ni7 type structure and a little LaNi3 second phases with PuNi3 type structure. With the increase of quenching rate, the LaNi5 phase with CaCu5 type structure and LaMgNi4 phase with MgCU4Sn type structure appear in the alloys, the content of the new phases increases but the content of alpha La2Ni7 phase and LaNi3 phase decreases. EPMA analysis indicates that the La2Mg0.9Ni7.5CO1.5Al0.1 alloys prepared by melt spun have fine columnar crystal structure. The electro- chemical measurement shows that the quenching rate has little effect on the activation property but the maximum discharge capacity and the high rate discharge ability decrease with the increase of quenching rate. It has a little improvement of the cyclic stability at the lower quenching rate as 5m/s, but the alloy electrode demonstrates better cyclic stability with the further increase of quenching rate as 20 m/s.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	中文
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000250961500037
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35576]
专题	兰州理工大学
通讯作者	Wu Yanjun
作者单位	1.Lanzhou Univ Sci & Technol, Coll Mat Sci & Engn, Lanzhou 730050, Peoples R China 2.Key Lab New Nonferrous Met Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wu Yanjun,Wang Dahui,Luo Yongchun,et al. Phase structure and electrochemical properties of La-Mg-Ni system La(2)Mg(0.9)Ni(7.5)Co(1.5)A(1.0) hydrogen storage alloys prepared by melt spun[J]. RARE METAL MATERIALS AND ENGINEERING,2007,36(10):1856-1860.
APA	Wu Yanjun,Wang Dahui,Luo Yongchun,Kang Long,&Yan Ruxu.(2007).Phase structure and electrochemical properties of La-Mg-Ni system La(2)Mg(0.9)Ni(7.5)Co(1.5)A(1.0) hydrogen storage alloys prepared by melt spun.RARE METAL MATERIALS AND ENGINEERING,36(10),1856-1860.
MLA	Wu Yanjun,et al."Phase structure and electrochemical properties of La-Mg-Ni system La(2)Mg(0.9)Ni(7.5)Co(1.5)A(1.0) hydrogen storage alloys prepared by melt spun".RARE METAL MATERIALS AND ENGINEERING 36.10(2007):1856-1860.